package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkSpaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.poifs.filesystem.NDocumentOutputStream;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.*;


@Slf4j
@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private WorkSpaceService workSpaceService;

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;
    @Autowired
    private ReportService reportService;

    /**
     * 统计指定时间区间的营业额数据
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {

        /*当前集合用于存放从begin到end范围内的每天的日期*/
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            //日期计算，计算指定时间的后一天对应的日期
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        /**
         * 存放每天营业额
         */
        List<Double> turnoverList = new ArrayList();
        for (LocalDate date : dateList) {
//            查询date日期对应的营业额数据，营业额是指：状态为已完成的订单金额合计
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);

            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
//            select sum（amount） from orders where status=5 and order_time>
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);

            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }
        //封装返回结果
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .turnoverList(StringUtils.join(turnoverList, ","))
                .build();
    }

    /**
     * 用户数据统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {

        //创建一个存储日期的集合
        List<LocalDate> dateList = new ArrayList<>();
//        把传传入的开始时间添加到dateList集合中
        dateList.add(begin);
//        把从开始日~结束日的每一天都拿到并塞入dateList集合中存储
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每天的新增用户数量  select count(id) from user where create_time <? and create_time > ?
        List<Integer> newUserList = new ArrayList<>();
//        存放每天的总用户数量    select count(id) from user where create_time <?
        List<Integer> totalUserList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map = new HashMap();
            map.put("end", endTime);
//            获取用户总条数
            Integer totalUserResult = userMapper.countByMap(map);
//          获取当前天内的新增用户数
            map.put("begin", beginTime);
            Integer newUserResult = userMapper.countByMap(map);
//            把条数添加到各自的list集合中去
            newUserList.add(newUserResult);
            totalUserList.add(totalUserResult);
        }
        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .newUserList(StringUtils.join(newUserList, ","))
                .totalUserList(StringUtils.join(totalUserList, ","))
                .build();
    }

    /**
     * 订单统计
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        /*List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //存放每日有效的订单数   status=5
        List<Integer> orderCountList = new ArrayList<>();
//        存放每日订单总数
        List<Integer> validOrderCountList = new ArrayList<>();
//        遍历list集合查询每天有效的订单数和订单总数
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MIN);
            Map map = new HashMap();
            map.put("begin", beginTime);
            map.put("end", endTime);
            Integer orderCount = orderMapper.countByMap(map);
            map.put("status", Orders.COMPLETED);
            Integer validOrderCount = orderMapper.countByMap(map);
            //把当日的有效订单数添加到保存每天有效订单数集合中去
            validOrderCountList.add(validOrderCount);
            //把当日的订单总数添加到保存每天订单总数集合中去
            orderCountList.add(orderCount);
        }
        //条件日期区间内所有订单总数
        *//*Integer totalOrderCount = 0;
        for (Integer countOrder : orderCountList) {
            totalOrderCount += countOrder.intValue();
        }*//*
        System.out.println("orderCountList: " + orderCountList);
        for (Integer countOrder : orderCountList) {
            System.out.println("countOrder: " + countOrder);
            totalOrderCount += countOrder;
        }
        System.out.println("totalOrderCount: " + totalOrderCount);
        //条件日期区间内所有有效订单数
        Integer validOrderCount = 0;
        for (Integer validOrder : validOrderCountList) {
            validOrderCount += validOrder.intValue();
        }
        //订单完成率
        Double orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount.doubleValue();
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(validOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();*/
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);

        while (!begin.equals(end)) {
            begin = begin.plusDays(1);
            dateList.add(begin);
        }
        //每天订单总数集合
        List<Integer> orderCountList = new ArrayList<>();
        //每天有效订单数集合
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate date : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //查询每天的总订单数 select count(id) from orders where order_time > ? and order_time < ?
            Integer orderCount = getOrderCount(beginTime, endTime, null);

            //查询每天的有效订单数 select count(id) from orders where order_time > ? and order_time < ? and status = ?
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }

        //时间区间内的总订单数
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //时间区间内的总有效订单数
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompletionRate = 0.0;
        if (totalOrderCount != 0) {
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();

    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSalesTop10(beginTime, endTime);
       /* List<String> name = goodsSalesDTOList.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        List<Integer> number = goodsSalesDTOList.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());*/
        List<String> name = new ArrayList<>();
        List<Integer> number = new ArrayList<>();
        for (GoodsSalesDTO goodsSalesDTO : goodsSalesDTOList) {
            String namee = goodsSalesDTO.getName();
            Integer numberr = goodsSalesDTO.getNumber();
            name.add(namee);
            number.add(numberr);
        }
        String nameList = StringUtils.join(name, ",");
        String numberList = StringUtils.join(number, ",");

        SalesTop10ReportVO salesTop10ReportVO = SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
        return salesTop10ReportVO;
    }

    /**
     * 导出运营数据报表
     * 1.查询数据库把数据先获取出来
     * 2.通过POI将数据写进excel表格中去
     * 3.通过输出流写回文件
     *
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);
//        查询数据库,获取营业额数据---查询最近30天的运营数据
//        查询概览数据
        BusinessDataVO businessDataVO = workSpaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));
//        2.通过POI把数据写入excel文件中
        InputStream inputStream = this.getClass()
                .getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
//            基于模板文件,创建一个新的excel文件
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
//            获取表格sheet1标签页
            XSSFSheet sheet = excel.getSheet("Sheet1");
//            填充数据 --时间
            sheet.getRow(1).getCell(1).setCellValue("时间:" + dateBegin + "至" + dateEnd);
//            获取第三行
            XSSFRow row = sheet.getRow(3);
//            填充营业额
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
//            填充订单完成率
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
//            填充新增用户数
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());
            row = sheet.getRow(4);
//            填充有效订单数
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
//            填充平均客单价
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());
//            填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO  businessData = workSpaceService.
                        getBusinessData(LocalDateTime.of(date, LocalTime.MIN),
                                LocalDateTime.of(date, LocalTime.MAX));
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            //            通过输出流将excel文件下载到客户端浏览器
            ServletOutputStream outputStream = response.getOutputStream();
            excel.write(outputStream);
            outputStream.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }




    }

    /**
     * 根据时间区间统计指定状态的订单数量
     *
     * @param beginTime
     * @param endTime
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime beginTime, LocalDateTime endTime, Integer status) {
        Map map = new HashMap();
        map.put("status", status);
        map.put("begin", beginTime);
        map.put("end", endTime);
        return orderMapper.countByMap(map);
    }


}
